Although “will” is now usual, SHALL is the correct form of the future for 1st person (singular and plural)
I disagree; there's a difference between the two statements. "Shall" is making a proposal; "will" is asking about the reality of such a situation.
"Will we be there still?" probably should be accepted.
I sprt of agree. I put that by accident, and it was rejected. But it is proper english, if not popular english
No, definitely not "popular": Ngrams